问题描述
我在修复从iOS 6到iOS 7的CoreBluetooth代码时遇到问题。我可以扫描外围设备并建立连接，但是，我无法使用iOS 7中提供的新CoreBluetooth方法重新连接外围设备。这是看看我是如何完成重新连接的：
I am having an issue updating my CoreBluetooth code from iOS 6 to iOS 7. I can scan for Peripherals and make connections, however, I am not able to reconnect a Peripheral using the new CoreBluetooth methods offered within iOS 7. Here is a look at how I am trying to accomplish the reconnection:
- (void)retrievePeripheral:(NSString *)uuidString
{
NSUUID *nsUUID = [[NSUUID UUID] initWithUUIDString:uuidString];
if(nsUUID)
{
NSArray *peripheralArray = [centralManager retrievePeripheralsWithIdentifiers:@[nsUUID]];
// Check for known Peripherals
if([peripheralArray count] > 0)
{
for(CBPeripheral *peripheral in peripheralArray)
{
NSLog(@"Connecting to Peripheral - %@", peripheral);
[self connectPeripheral:peripheral];
}
}
// There are no known Peripherals so we check for connected Peripherals if any
else
{
CBUUID *cbUUID = [CBUUID UUIDWithNSUUID:nsUUID];
NSArray *connectedPeripheralArray = [centralManager retrieveConnectedPeripheralsWithServices:@[cbUUID]];
// If there are connected Peripherals
if([connectedPeripheralArray count] > 0)
{
for(CBPeripheral *peripheral in connectedPeripheralArray)
{
NSLog(@"Connecting to Peripheral - %@", peripheral);
[self connectPeripheral:peripheral];
}
}
// Else there are no available Peripherals
else
{
// No Dice!
NSLog(@"There are no available Peripherals");
}
}
}
}
uuidString是保存的Peripheral UUID。
Where uuidString is the saved Peripheral UUID.
我总是进入没有可用外围设备的NSLog语句。我想我错过了一些非常明显的东西，有人可以指出我正确的方向。
I am always getting to the NSLog statement where there are no available Peripherals. I suppose I am missing something very obvious and someone can point me in the right direction.
此外，我还阅读了有关CoreBluetooth和iOS3更新问题的其他帖子我曾尝试重置BLE设备和iOS设备，但无济于事。
In addition, I have read other posts about the iOS 7 update issues with CoreBluetooth and have tried reseting the BLE device and the iOS device but to no avail.
提前致谢！
声音
Thanks in Advance!audible
推荐答案
事实证明，我的错误是如何将外围设备的标识符转换为<$ c在将消息发送到我的retrievePeripheral方法之前，$ c> NSString 格式。
It turns out that my mistake dealt with how I was converting the Peripheral's identifier into an NSString format before sending a message to my retrievePeripheral method.
这是不正确的方式：
NSString *uuidString = [NSString stringWithFormat:@"%@", CFUUIDCreateString(NULL, (__bridge CFUUIDRef)([peripheral identifier]))];
这是正确的方式（在我的方案中有效）：
This was the correct way (that worked in my scenario):
NSString *uuidString = [NSString stringWithFormat:@"%@", [[peripheral identifier] UUIDString]];
根据Apple文档， NSUUID 类与CoreFoundation的 CFUUIDRef 没有免费桥接，如下所述：
According to the Apple Documentation the NSUUID Class is not toll-free bridged with CoreFoundation's CFUUIDRef as described below:
对于那些喜欢直观表达我这意味着什么的人来说，这是一个例子：）
For those of you who like a visual representation of what this means like I do here is an example:)
打印的外围信息控制台：
The Peripheral information printed within the Console:
<CBPeripheral: 0x14699430 identifier = DD2468AB-1865-B926-7FA4-AE3755D479D8, Name = "IDYNAMO EMV-A27F", state = disconnected>
将Peripheral的标识符转换为 NSString的错误方法收益率：
The incorrect way of converting the Peripheral's identifier into an NSString yields:
1865B926-7FA4-AE37-55D4-79D800000000
将外围设备的标识符转换为 NSString 的正确方法产生：
The correct way of converting the Peripheral's identifier into an NSString yields:
DD2468AB-1865-B926-7FA4-AE3755D479D8
我希望这可以帮助某人完成他们的BLE旅程，如果我错了，我可以随时纠正我，因为我还在学习这些东西。
I hope this helps someone on their BLE journey and feel free to correct me if I am wrong in any way as I am still learning this stuff as well.
谢谢！
听得见
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